Duct Options Bar Settings

Use the following settings while drawing duct.

Level: (3D, elevation, and section views only) specifies the reference level for the duct.
Width: specifies the width for a rectangular or oval duct.
Height: specifies the height for a rectangular or oval duct.
Diameter: specifies the diameter for a round duct section.
Middle Elevation: Specifies the vertical elevation of the duct relative to the current level. You can enter a middle elevation value or select from a list of remembered middle elevation values.
/: Locks/unlocks the elevation for the segment. When locked, the elevation of the segment is maintained and connections cannot be made to segments at a different elevation.
Apply:Applies the current Option Bar settings. When you specify a Middle Elevation to draw a vertical duct in plan view and click Apply, Revit creates the vertical duct between the original Middle Elevation and the setting being applied.